ABAP Select data from SAP table AFWCH_FCAT_SAMP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP AFWCH_FCAT_SAMP table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to AFWCH_FCAT_SAMP. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the AFWCH_FCAT_SAMP table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_AFWCH_FCAT_SAMP TYPE STANDARD TABLE OF AFWCH_FCAT_SAMP,
      WA_AFWCH_FCAT_SAMP TYPE AFWCH_FCAT_SAMP,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <AFWCH_FCAT_SAMP> TYPE AFWCH_FCAT_SAMP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_AFWCH_FCAT_SAMP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM AFWCH_FCAT_SAMP
  INTO TABLE IT_AFWCH_FCAT_SAMP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AFWCH_FCAT_SAMP
*  INTO TABLE @DATA(IT_AFWCH_FCAT_SAMP2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_AFWCH_FCAT_SAMP INDEX 1 INTO DATA(WA_AFWCH_FCAT_SAMP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_AFWCH_FCAT_SAMP ASSIGNING <AFWCH_FCAT_SAMP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AFWCH_FCAT_SAMP>-FIENM = 1.
<AFWCH_FCAT_SAMP>-USGFL = 1.
<AFWCH_FCAT_SAMP>-ROLNM = 1.
<AFWCH_FCAT_SAMP>-TIMFL = 1.
<AFWCH_FCAT_SAMP>-CHTAB = 1.

ENDLOOP.

LOOP AT IT_AFWCH_FCAT_SAMP INTO WA_AFWCH_FCAT_SAMP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AFWCH_FCAT_SAMP-CHFIE, sy-vline,
  WA_AFWCH_FCAT_SAMP-VALEX, sy-vline,
  WA_AFWCH_FCAT_SAMP-FIXVL, sy-vline,
  WA_AFWCH_FCAT_SAMP-TIMLC, sy-vline,
  WA_AFWCH_FCAT_SAMP-RETAB, sy-vline,
  WA_AFWCH_FCAT_SAMP-REFIE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AFWCH_FCAT_SAMP you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_AFWCH_FCAT_SAMP TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_AFWCH_FCAT_SAMP INTO WA_AFWCH_FCAT_SAMP.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit CUNIT, internal->external for field UNIT0
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_AFWCH_FCAT_SAMP-UNIT0
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFWCH_FCAT_SAMP-UNIT0.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_AFWCH_FCAT_SAMP_STR, 
FIENM TYPE STRING,
USGFL TYPE STRING,
ROLNM TYPE STRING,
TIMFL TYPE STRING,
CHTAB TYPE STRING,
CHFIE TYPE STRING,
VALEX TYPE STRING,
FIXVL TYPE STRING,
TIMLC TYPE STRING,
RETAB TYPE STRING,
REFIE TYPE STRING,
REFIL TYPE STRING,
REFLL TYPE STRING,
VIEWN TYPE STRING,
TCDIS TYPE STRING,
TCMOD TYPE STRING,
ATRFB TYPE STRING,
SPCTR TYPE STRING,
ORTAB TYPE STRING,
ORFIE TYPE STRING,
OAPPL TYPE STRING,
OAFIE TYPE STRING,
DIMPR TYPE STRING,
REPIN TYPE STRING,
PLAIN TYPE STRING,
LITIN TYPE STRING,
RCSIN TYPE STRING,
RSLIN TYPE STRING,
CHAIN TYPE STRING,
AGGDI TYPE STRING,
AGGTM TYPE STRING,
AGGFI TYPE STRING,
PRDEC TYPE STRING,
PRSNT TYPE STRING,
SBGRP TYPE STRING,
CCNUM TYPE STRING,
DCURR TYPE STRING,
RFTAB TYPE STRING,
RFFIE TYPE STRING,
DSRFF TYPE STRING,
CQMRK TYPE STRING,
CUKY0 TYPE STRING,
UNIT0 TYPE STRING,
CQFIE TYPE STRING,
TFLAG TYPE STRING,
COBJID TYPE STRING,
DMAC TYPE STRING,
CHNAM TYPE STRING,
CHDAT TYPE STRING,
CHTIM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AFWCH_FCAT_SAMP_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_AFWCH_FCAT_SAMP_STR-FIENM sy-vline 
WA_AFWCH_FCAT_SAMP_STR-USGFL sy-vline 
WA_AFWCH_FCAT_SAMP_STR-ROLNM sy-vline 
WA_AFWCH_FCAT_SAMP_STR-TIMFL sy-vline 
WA_AFWCH_FCAT_SAMP_STR-CHTAB sy-vline 
WA_AFWCH_FCAT_SAMP_STR-CHFIE sy-vline 
WA_AFWCH_FCAT_SAMP_STR-VALEX sy-vline 
WA_AFWCH_FCAT_SAMP_STR-FIXVL sy-vline 
WA_AFWCH_FCAT_SAMP_STR-TIMLC sy-vline 
WA_AFWCH_FCAT_SAMP_STR-RETAB sy-vline 
WA_AFWCH_FCAT_SAMP_STR-REFIE sy-vline 
WA_AFWCH_FCAT_SAMP_STR-REFIL sy-vline 
WA_AFWCH_FCAT_SAMP_STR-REFLL sy-vline 
WA_AFWCH_FCAT_SAMP_STR-VIEWN sy-vline 
WA_AFWCH_FCAT_SAMP_STR-TCDIS sy-vline 
WA_AFWCH_FCAT_SAMP_STR-TCMOD sy-vline 
WA_AFWCH_FCAT_SAMP_STR-ATRFB sy-vline 
WA_AFWCH_FCAT_SAMP_STR-SPCTR sy-vline 
WA_AFWCH_FCAT_SAMP_STR-ORTAB sy-vline 
WA_AFWCH_FCAT_SAMP_STR-ORFIE sy-vline 
WA_AFWCH_FCAT_SAMP_STR-OAPPL sy-vline 
WA_AFWCH_FCAT_SAMP_STR-OAFIE sy-vline 
WA_AFWCH_FCAT_SAMP_STR-DIMPR sy-vline 
WA_AFWCH_FCAT_SAMP_STR-REPIN sy-vline 
WA_AFWCH_FCAT_SAMP_STR-PLAIN sy-vline 
WA_AFWCH_FCAT_SAMP_STR-LITIN sy-vline 
WA_AFWCH_FCAT_SAMP_STR-RCSIN sy-vline 
WA_AFWCH_FCAT_SAMP_STR-RSLIN sy-vline 
WA_AFWCH_FCAT_SAMP_STR-CHAIN sy-vline 
WA_AFWCH_FCAT_SAMP_STR-AGGDI sy-vline 
WA_AFWCH_FCAT_SAMP_STR-AGGTM sy-vline 
WA_AFWCH_FCAT_SAMP_STR-AGGFI sy-vline 
WA_AFWCH_FCAT_SAMP_STR-PRDEC sy-vline 
WA_AFWCH_FCAT_SAMP_STR-PRSNT sy-vline 
WA_AFWCH_FCAT_SAMP_STR-SBGRP sy-vline 
WA_AFWCH_FCAT_SAMP_STR-CCNUM sy-vline 
WA_AFWCH_FCAT_SAMP_STR-DCURR sy-vline 
WA_AFWCH_FCAT_SAMP_STR-RFTAB sy-vline 
WA_AFWCH_FCAT_SAMP_STR-RFFIE sy-vline 
WA_AFWCH_FCAT_SAMP_STR-DSRFF sy-vline 
WA_AFWCH_FCAT_SAMP_STR-CQMRK sy-vline 
WA_AFWCH_FCAT_SAMP_STR-CUKY0 sy-vline 
WA_AFWCH_FCAT_SAMP_STR-UNIT0 sy-vline 
WA_AFWCH_FCAT_SAMP_STR-CQFIE sy-vline 
WA_AFWCH_FCAT_SAMP_STR-TFLAG sy-vline 
WA_AFWCH_FCAT_SAMP_STR-COBJID sy-vline 
WA_AFWCH_FCAT_SAMP_STR-DMAC sy-vline 
WA_AFWCH_FCAT_SAMP_STR-CHNAM sy-vline 
WA_AFWCH_FCAT_SAMP_STR-CHDAT sy-vline 
WA_AFWCH_FCAT_SAMP_STR-CHTIM sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.